Loie Fuller, American dancer and theatre innovator known as the 'Butterfly Girl' and inventing the 'Serpentine Dance', often performed at Folies Bergère and was so revered she did Danse Serpentine for Lumière films. She was the first American modern dancer to perform in Europe and introduced Isadora Duncan to Europe as well. Her spouse was Gabrielle Bloch and a wonderful 1902 portrait of Loie can be found here, by Frederick Glasier http://www.shorpy.com/node/1641?size=_original